To know the histological features of some sensory receptors namely: Pacinian and Meissner

corpuscles.

Epithelia

Epithelium forms continuous layers of cells that cover surfaces and line cavities of the body.

Epithelia cell shape

Epithelia sectioning appearance

Epithelia Classification

The number of cell layers: a single layer = simple epithelium; epithelia composed of more than one layer = stratified epithelia.

The shape of the component cells when seen in sections taken at right angles to the epithelial surface: the shape may be squamous (flattened), cuboidal (about equal dimensions), or columnar (taller than it is wide).

The presence of surface specializations e.g. cilia, microvilli and keratin.

sebaceous gland - holocrine gland associated with both the hair follicle and hairless parts of the skin (lips, cheek oral surface and external genitalia). Embedded in the dermis and are sites of infections (acne).

simple - consisting of a single cell layer.

squamous - flattened.

stratified - consisting of several cell layers.

terminal hairs - hair seen in obviously hairy parts of the body.

thick skin - refers to the skin histology found on the palms of the hand and soles of the feet, do not contain hair. Note that this is used as a histological term not a measurement of overall skin thickness.

thin skin - refers to the skin histology found on skin in all other regions beside palms and soles.

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